If you’re reading this, you probably live in a country that is a party to United Nations Convention Against Torture.
If your company is allowing this, please contact your government or another member state.
The accessibility laws are actually quite new and not fully in effect.
These would be different than broadcast-specific laws or regulations. That being said, I’m a bit surprised that the CBC would be missing CC.
And don’t forget about namespaces. Look at formats like HAL and ODATA that try to add HATEOAS onto JSON.